Smart lock



FIG. 1 is a front perspective view of a smart lock according to my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Broken lines are environmental only and form no part of the claimed design.

The broken lines shown represent portions of the smart lock that form no part of the claimed design. 

CLAIM The ornamental design for a smart lock, as shown and described. 